System and method for email signature extraction from unstructured text

A process for extracting structured contact data from a signature block in an unstructured text or email, said process comprising:

• (a) receiving an unstructured text or email from a data source;
• (b) determining a position of a signature block candidate within said unstructured text or email;
• (c) validating patterns and sentence bounds and/or parts of speech detection in said signature block candidate, thereby determining that said signature block candidate comprises a valid signature line and is a detected signature block;
• (d) using a named entity recognition model with a pattern matcher to detect from said detected signature block a business name candidate and address line;
• (e) using an attribute parser to extract attributes of standard formats from at least one selected from the group consisting of:
• phone number, URL, email address and social media handle, thus yielding extracted attributes;
• (f) sending said extracted attributes to a structured contact profile data file;
• (g) using a fuzzy match organization name model to determine if said business name candidate is either an exact or close match to a pre-existing organization name database set;
• (h) assigning an attribute confidence score to said business name candidate;
• (i) sending said attribute confidence score to said structured contact data file;
• (j) extracting structured street, city, state and/or zip code from said address line;
• and
• (k) sending said extracted structure street, city, state and/or zip code to said structured contact data file.